QUANTITATIVE EVALUATION OF CHLORIDE INGRESS IN FLY ASH CONCRETE BY ELECTRON PROBE MICRO ANALYSIS (EPMA)

摘要：

Chloride ingress in fly ash concrete was evaluated by the electron probe microanalysis (EPMA). Profile of characteristic X-ray strength for chlorine was obtained for fly ashconcrete by EPMA and used to calculate apparent diffusion coefficient of chloride ions. Alinear equation of characteristic X-ray strength and total concentration of chloride ions thatwas measured by a conventional acid extraction method was determined. Surface concent-ration of chloride ions was then determined. It was found that the profile of total concent-ration of chloride ions that was calculated with the apparent diffusion coefficient and surfaceconcentration of chloride ions was comparable to experimental results. Fly ash concrete usedfor concrete breakwater structure showed higher resistance against chloride ingress after 6.75years in service.

关键词： fly ash concrete chloride ingress EPMA calculated chloride profile

作者: Sugiyama Takafumi Suzuki Kenta Kawakita Masahiro Shimura Kazunori

作者单位: Division of Built Environment,Hokkaido University,Japan Prefecture Government of Ishikawa,Japan

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 295-301

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）